Abstract
Influences of composition deviation from stoichiometry and heat treatment on crystal phases and Q factor in Ba(Zn1/3Nb2/3)O3(BZN) were studied. The structural order and the crystal phases strongly depended on the slight composition deviation from stoichiometric BZN. The maximum Q factor was obtained at the vicinity of the stoichiometric BZN. In the other regions, non-stoichiometric disordered BZN or ordered BZN with secondary phase were formed, and their Q factors were found to be low. For the stoichiometric BZN, the order-disorder phase transition occurred between 1300 and 1400∘C. The crystal-structural ordering of the stoichiometric BZN was improved by post-annealing at below its transition temperature, conserving the density and the grain size. However, no significant Q factor improvement was found. The Q factor of the stoichiometric BZN strongly depends on the density and grain size not on the crystal-structural order. These results suggest that the ceramic microstructure such as the pore and grain boundary, the secondary phase and lattice defect caused by non-stoichiometry affect the variation of the Q factor in BZN system than the crystal-structural ordering.
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References
K. Wakino, Ferroelectrics, 91, 69 (1986).
S. Kawashima, M. Nishida, I. Ueda, and H. Ouchi, J. Am. Ceram. Soc., 66, 421 (1983).
D.A. Sagala and S. Nambu, J. Am. Ceram. Soc., 75, 2573 (1992).
H. Tamura, Jpn. J. Appl. Phys., 32, 2774 (1993).
F. Gallasso and W. Darby, J. Phys. Chem., 66, 131 (1962).
T. Hiuga, K. Matsumoto, and H. Ichimura, Shingaku Technical Report of IEICE., CPM86-31, 41 (1986) (in Japanese).
E. Koga and H. Moriwake, J. Ceram. Soc. Japan, 111, 767 (2003) (in Japanese).
S. -Y. Noa, M. -J. Yoo, S. Nahm, C. -H. Choi, H. -M. Park, and H. -J. Lee, Jpn. J. Appl. Phys., 41, 2978 (2002).
K. -S. Hong, I. -T. Kim, and C. -D. Kim, J. Am. Ceram. Soc., 79, 3218 (1996).
E. Koga, H. Moriwake, K. Kakimoto, and H. Ohsato, J. Ceram. Soc. Japan, 113, 172 (2005) (in Japanese).
E. Koga, Y. Yamagishi, H. Moriwake, K. Kakimoto, and H. Ohsato, J. Eur. Ceram. Soc., 26, 1961 (2006).
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Koga, E., Yamagishi, Y., Moriwake, H. et al. Order-disorder transition and its effect on microwave quality factor Q in Ba(Zn1/3Nb2/3)O3 system. J Electroceram 17, 375–379 (2006). https://doi.org/10.1007/s10832-006-9384-4
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DOI: https://doi.org/10.1007/s10832-006-9384-4